Hi Namaz,
Start troubleshooting layer for layer:
1. Does the client succes the 802.11 authenticated handshake?
# show auth-tracebuf mac "client mac-address"
2. Does the client get a user-role?
# show user-table mac "client mac-address"
3. What ACL belongs to the user-role
4. Does the client get a dchp lease?
Some other quick test. Create a new temporarily new SSID with same settings through the wizard to quickly see if your issue is related to the SSID configuration or related profiles.